The D, E, H, L, R, and W traces are mild rail while the A Line, B Line, G Line and N Line are commuter rail. The commuter rail A Line from Denver Union Station to Denver International Airport opened in April 2016 with ridership exceeding RTD's early anticipations. KDEN-Tv, channel 25, a Telemundo O&O station. Amtrak Thruway assistance operated by private bus firms backlinks the Denver station with Rocky Mountain details.